Patents by Inventor Asami Nakai
Asami Nakai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11834294Abstract: Provided is a wound body of a commingled yarn, the wound body being capable of effectively suppressing fraying and sagging, disorder of a lower layer, or breakage of the commingled yarn during winding or use. Also provided is a method for manufacturing the wound body.Type: GrantFiled: August 30, 2019Date of Patent: December 5, 2023Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Asami Nakai, Masataka Kaji, Mitsuro Takagi, Toshihiro Motochika, Nobuhiko Matsumoto
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Publication number: 20230107427Abstract: Provided are a hose excelling in a lightweight property and in fatigue fracture resistance, a method for manufacturing the hose, and a hydraulic pump. The hose includes a tube, an interior of the tube being hollow, continuous carbon fibers and/or continuous glass fibers wound around an outer circumference of the tube, and a thermosetting resin present external to the tube. The thermosetting resin has an elastic modulus from 0.5 to 10 MPa, and the continuous carbon fibers and/or continuous glass fibers are impregnated with at least a part of the thermosetting resin. The elastic modulus of the thermosetting resin is a numeric value determined by: heating the thermosetting resin for 2 hours at a curing temperature of the thermosetting resin; then subjecting the thermosetting resin to thermoregulation for two weeks under a condition of a temperature of 23° C. and a relative humidity of 55%; and then performing a measurement in accordance with JIS K7161:2019.Type: ApplicationFiled: February 26, 2021Publication date: April 6, 2023Inventors: Asami NAKAI, Masataka KAJI, Toshihiro MOTOCHIKA, Keisuke IDE, Nobuhiko MATSUMOTO
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Patent number: 11499022Abstract: To provide a novel material that maintains suppleness which is the advantage of a material using fibers and has a low thermal shrinkage ratio, and a method for producing the material, a partially welded material using the material, a composite material, and a method for producing a molded product.Type: GrantFiled: March 1, 2018Date of Patent: November 15, 2022Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Asami Nakai, Masataka Kaji, Mitsuro Takagi, Nobuhiko Matsumoto
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Patent number: 11235513Abstract: Provided is a method for manufacturing a three-dimensional structure, capable of yielding a three dimensional structure that excels in buildability. The method for manufacturing a three-dimensional structure, comprises melting a filament that contains a thermoplastic resin by using a 3D printer, and depositing it onto a base, and comprising bonding the filament at one end of the filament to a surface of the base so as to achieve a bond strength to the base of 15 N or larger, and discharging the filament through a nozzle of the 3D printer onto a surface of the base so as to deposit thereon, while moving at least one of the base or the nozzle.Type: GrantFiled: January 16, 2017Date of Patent: February 1, 2022Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Asami Nakai, Akio Ohtani, Hiroto Ito, Fumiya Hirano, Nobuki Hirooka, Nobuhiko Matsumoto
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Patent number: 11236446Abstract: Provided is a commingled yarn having a dispersing property and having a smaller amount of voids, a method for manufacturing the commingled yarn, and a weave fabric using the commingled yarn. The commingled yarn comprises a continuous thermoplastic resin fiber, a continuous reinforcing fiber, and a surface treatment agent and/or sizing agent, comprises the surface treatment agent and/or sizing agent in a content of 2.0% by weight or more, relative to a total amount of the continuous thermoplastic resin fiber and the continuous reinforcing fiber, and has a dispersibility of the continuous thermoplastic resin fiber and the continuous reinforcing fiber of 70% or larger.Type: GrantFiled: October 10, 2014Date of Patent: February 1, 2022Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Asami Nakai, Akio Ootani, Masataka Kaji, Mitsuro Takagi, Nobuhiko Matsumoto, Jun Mitadera
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Publication number: 20210347111Abstract: Provided is the method for manufacturing a three-dimensional structure with a less amount of internal voids or bubbles, and also to provide a 3D printer filament used for manufacturing such three-dimensional structure. The method for manufacturing a three-dimensional structure, the method comprises melting and depositing a filament using a 3D printer, the filament comprising a commingled yarn that contains a continuous reinforcing fiber (A) and a continuous thermoplastic resin fiber (B), with a dispersity of the continuous reinforcing fiber (A) in the commingled yarn of 60 to 100%.Type: ApplicationFiled: July 20, 2021Publication date: November 11, 2021Inventors: Asami NAKAI, Akio OHTANI, Hiroto ITO, Fumiya HIRANO, Nobuki HIROOKA, Nobuhiko MATSUMOTO
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Publication number: 20210316956Abstract: Provided is a wound body of a commingled yarn, the wound body being capable of effectively suppressing fraying and sagging, disorder of a lower layer, or breakage of the commingled yarn during winding or use. Also provided is a method for manufacturing the wound body.Type: ApplicationFiled: August 30, 2019Publication date: October 14, 2021Inventors: Asami NAKAI, Masataka KAJI, Mitsuro TAKAGI, Toshihiro MOTOCHIKA, Nobuhiko MATSUMOTO
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Patent number: 11117312Abstract: Provided is the method for manufacturing a three-dimensional structure with a less amount of internal voids or bubbles, and also to provide a 3D printer filament used for manufacturing such three-dimensional structure. The method for manufacturing a three-dimensional structure, the method comprises melting and depositing a filament using a 3D printer, the filament comprising a commingled yarn that contains a continuous reinforcing fiber (A) and a continuous thermoplastic resin fiber (B), with a dispersity of the continuous reinforcing fiber (A) in the commingled yarn of 60 to 100%.Type: GrantFiled: January 16, 2017Date of Patent: September 14, 2021Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Asami Nakai, Akio Ohtani, Hiroto Ito, Fumiya Hirano, Nobuki Hirooka, Nobuhiko Matsumoto
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Publication number: 20210060851Abstract: Provided is the method for manufacturing a three-dimensional structure with a less amount of internal voids or bubbles, and also to provide a 3D printer filament used for manufacturing such three-dimensional structure. The method for manufacturing a three-dimensional structure, the method comprises melting and depositing a filament using a 3D printer, the filament comprising a commingled yarn that contains a continuous reinforcing fiber (A) and a continuous thermoplastic resin fiber (B), with a dispersity of the continuous reinforcing fiber (A) in the commingled yarn of 60 to 100%.Type: ApplicationFiled: January 16, 2017Publication date: March 4, 2021Inventors: Asami NAKAI, Akio OHTANI, Hiroto ITO, Fumiya HIRANO, Nobuki HIROOKA, Nobuhiko MATSUMOTO
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Patent number: 10926488Abstract: Provided is a composite material capable of keeping a good appearance even after heat processed, a method for manufacturing a composite material and a method for manufacturing a molded article. The composite material of the present invention contains a commingled yarn that contains a continuous reinforcing fiber (A) and a continuous thermoplastic resin fiber (B) as fiber components thereof; and a thermoplastic resin fiber (C) that keeps the commingled yarn in place, a thermoplastic resin that composes the thermoplastic resin fiber (C) having a melting point 15° C. or more higher than the melting point of a thermoplastic resin that composes the continuous thermoplastic resin fiber (B).Type: GrantFiled: April 1, 2016Date of Patent: February 23, 2021Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Akio Ohtani, Asami Nakai, Masataka Kaji, Mitsuro Takagi, Nobuhiko Matsumoto
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Patent number: 10828807Abstract: Provided is method for manufacturing a molded article that has a first portion, and a second portion that rises up from the first portion, the method comprising: placing a second material on a surface of a first material; the first material containing a reinforcing fiber (A) with a length exceeding 30 mm and a thermoplastic resin (B), the reinforcing fiber (A) being dispersed in the first material, and, the thermoplastic resin (B) being not substantially impregnated into the reinforcing fiber (A), and the second material containing a reinforcing fiber (a) with a length of 1 to 30 mm and a thermoplastic resin (b), the reinforcing fiber (a) being dispersed into the second material, and, the thermoplastic resin (b) being not substantially impregnated into the reinforcing fiber (a), and simultaneously forming the first portion and the second portion by one stroke of pressing, with a cohesive strength of the thermoplastic resin (B) and the thermoplastic resin (b) of 2 N/15 mm or larger, where the cohesive strengthType: GrantFiled: April 1, 2016Date of Patent: November 10, 2020Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Akio Ohtani, Asami Nakai, Masataka Kaji, Mitsuro Takagi, Nobuhiko Matsumoto
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Patent number: 10654227Abstract: A method of manufacturing an elongated resin molded article having a hollow structure including: using an elongated elastic core including a composite of an elastic body and a continuous yarn; molding a resin material on an outer peripheral surface of the elastic core; and then exerting tensile force on the elastic core and extracting the elastic core in a lengthwise direction so as to obtain the elongated resin molded article having the hollow structure. An elongated resin molded article having a hollow structure, including a curved portion and a branched portion in combination, wherein the resin molded article has a composite structure in which a resin material is reinforced with a braided continuous fiber across an entire length thereof including the curved portion and the branched portion.Type: GrantFiled: February 23, 2016Date of Patent: May 19, 2020Assignee: SUMITOMO RIKO COMPANY LIMITEDInventors: Yasuhiko Mihara, Shigemitsu Hattori, Asami Nakai, Tadashi Uozumi, Akio Ohtani
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Publication number: 20200094455Abstract: Providing an outer cylinder for a hydraulic shock absorber, having excellent productivity and a method of molding the outer cylinder for the hydraulic shock absorber. The outer cylinder for the hydraulic shock absorber includes an intermediate body and an outer case body. The intermediate body is formed by weaving (textile-processing) a continuous reinforcement fiber into a cylindrical shape. The outer case body is molded from a polyamide resin that is a thermoplastic resin that forms irregularities on an outside of the intermediate body while being impregnated into the intermediate body. The textile-processing is a process of braiding, weaving or knitting fibers to produce a flat or tubular fabric, cord or the like.Type: ApplicationFiled: March 22, 2018Publication date: March 26, 2020Applicant: KYB CorporationInventors: Hideto GUMMA, Asami NAKAI
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Publication number: 20200061906Abstract: Provided is a method for manufacturing a three-dimensional structure, capable of yielding a three dimensional structure that excels in buildability. The method for manufacturing a three-dimensional structure, comprises melting a filament that contains a thermoplastic resin by using a 3D printer, and depositing it onto a base, and comprising bonding the filament at one end of the filament to a surface of the base so as to achieve a bond strength to the base of 15 N or larger, and discharging the filament through a nozzle of the 3D printer onto a surface of the base so as to deposit thereon, while moving at least one of the base or the nozzle.Type: ApplicationFiled: January 16, 2017Publication date: February 27, 2020Inventors: Asami NAKAI, Akio OHTANI, Hiroto ITO, Fumiya HIRANO, Nobuki HIROOKA, Nobuhiko MATSUMOTO
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Publication number: 20200002484Abstract: To provide a novel material that maintains suppleness which is the advantage of a material using fibers and has a low thermal shrinkage ratio, and a method for producing the material, a partially welded material using the material, a composite material, and a method for producing a molded product.Type: ApplicationFiled: March 1, 2018Publication date: January 2, 2020Inventors: Asami NAKAI, Masataka KAJI, Mitsuro TAKAGI, Nobuhiko MATSUMOTO
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Patent number: 10252125Abstract: To provide a lightweight shaft having excellent strength, a shaft has one or a plurality of fiber reinforced resin layers. At least one of the fiber reinforced resin layers is produced by a filament winding method in which one or a plurality of fiber bundles are wound while tension is applied thereto. The fiber bundles each include a plurality of filaments. The tension applied to the fiber bundles is not less than 0.04 (gf) per filament. The tension is great. Preferably, at least one of the fiber reinforced resin layers is produced by a multi-filament winding method in which a plurality of the fiber bundles are simultaneously wound while being arranged side by side. Preferably, fibers forming the filaments are carbon fibers. Preferably, a resin composition included in each fiber reinforced resin layer is an epoxy resin composition.Type: GrantFiled: April 27, 2016Date of Patent: April 9, 2019Assignees: SUMITOMO RUBBER INDUSTRIES, LTD., GIFU UNIVERSITYInventors: Takehiko Hyodo, Yumi Kanemitsu, Asami Nakai, Akio Ohtani, Tadashi Uozumi
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Patent number: 9994976Abstract: Provided is a method for manufacturing a commingled yarn that is capable of keeping a high level of dispersion of the continuous reinforcing fiber and the continuous resin fiber, moderately flexible, and less likely to cause fiber separation, and a commingled yarn a wind-up article and a woven fabric. The method for manufacturing a commingled yarn includes commingling a thermoplastic resin fiber having a treatment agent for the thermoplastic resin fiber on a surface thereof, and a continuous reinforcing fiber having a treatment agent for the continuous reinforcing fiber on a surface thereof, and heating the commingled fibers at a temperature in a range from a melting point of the thermoplastic resin composing the thermoplastic resin fiber, up to 30K higher than the melting point.Type: GrantFiled: September 3, 2015Date of Patent: June 12, 2018Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Asami Nakai, Akio Ootani, Masataka Kaji, Mitsuro Takagi, Nobuhiko Matsumoto
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Publication number: 20180126674Abstract: Provided is a composite material capable of keeping a good appearance even after heat processed, a method for manufacturing a composite material and a method for manufacturing a molded article. The composite material of the present invention contains a commingled yarn that contains a continuous reinforcing fiber (A) and a continuous thermoplastic resin fiber (B) as fiber components thereof; and a thermoplastic resin fiber (C) that keeps the commingled yarn in place, a thermoplastic resin that composes the thermoplastic resin fiber (C) having a melting point 15° C. or more higher than the melting point of a thermoplastic resin that composes the continuous thermoplastic resin fiber (B).Type: ApplicationFiled: April 1, 2016Publication date: May 10, 2018Inventors: Akio OHTANI, Asami NAKAI, Masataka KAJI, Mitsuro TAKAGI, Nobuhiko MATSUMOTO
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Publication number: 20180078834Abstract: To provide a lightweight shaft having excellent strength, a shaft has one or a plurality of fiber reinforced resin layers. At least one of the fiber reinforced resin layers is produced by a filament winding method in which one or a plurality of fiber bundles are wound while tension is applied thereto. The fiber bundles each include a plurality of filaments. The tension applied to the fiber bundles is not less than 0.04 (gf) per filament. The tension is great. Preferably, at least one of the fiber reinforced resin layers is produced by a multi-filament winding method in which a plurality of the fiber bundles are simultaneously wound while being arranged side by side. Preferably, fibers forming the filaments are carbon fibers. Preferably, a resin composition included in each fiber reinforced resin layer is an epoxy resin composition.Type: ApplicationFiled: April 27, 2016Publication date: March 22, 2018Applicants: SUMITOMO RUBBER INDUSTRIES, LTD., GIFU UNIVERSITYInventors: Takehiko HYODO, Yumi KANEMITSU, Asami NAKAI, Akio OHTANI, Tadashi UOZUMI
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Publication number: 20180056553Abstract: Provided is method for manufacturing a molded article that has a first portion, and a second portion that rises up from the first portion, the method comprising: placing a second material on a surface of a first material; the first material containing a reinforcing fiber (A) with a length exceeding 30 mm and a thermoplastic resin (B), the reinforcing fiber (A) being dispersed in the first material, and, the thermoplastic resin (B) being not substantially impregnated into the reinforcing fiber (A), and the second material containing a reinforcing fiber (a) with a length of 1 to 30 mm and a thermoplastic resin (b), the reinforcing fiber (a) being dispersed into the second material, and, the thermoplastic resin (b) being not substantially impregnated into the reinforcing fiber (a),and simultaneously forming the first portion and the second portion by one stroke of pressing, with a cohesive strength of the thermoplastic resin (B) and the thermoplastic resin (b) of 2 N/15 mm or larger, where the cohesive strengthType: ApplicationFiled: April 1, 2016Publication date: March 1, 2018Inventors: Akio OHTANI, Asami NAKAI, Masataka KAJI, Mitsuro TAKAGI, Nobuhiko MATSUMOTO